Comics Code Authority in the context of "Vertigo Comics"

Catwoman is a character appearing in American comic books published by DC Comics. Created by Bill Finger and Bob Kane, she debuted as "the Cat" in Batman #1 (spring 1940). She has become one of the superhero Batman's most prominent enemies, belonging to the collective of adversaries that make up his rogues gallery, as well as Batman's best known and most enduring love interest, with many stories depicting their complex love–hate relationship. Since 1993, Catwoman has had her own ongoing series, Catwoman.

Catwoman is the alter ego of Selina Kyle, a burglar in Gotham City who usually wears a skintight bodysuit and uses a bullwhip for a weapon. She was originally characterized as a supervillain and adversary of Batman, but has been featured in an eponymous series since the 1990s that portrays her as an antiheroine, often with a utilitarian moral philosophy. The character thrived in her earliest appearances, but she took an extended hiatus from September 1954 to November 1966 due to the developing Comics Code Authority in 1954. These issues involved the rules regarding the development and portrayal of female characters that were in violation of the Comics Code, a code which is no longer in use. In the comics, Holly Robinson and Eiko Hasigawa have both adopted the Catwoman identity, apart from Selina Kyle.

The Joker is a supervillain appearing in American comic books published by DC Comics. Created by Bill Finger, Bob Kane, and Jerry Robinson, the character first appeared in the debut issue of the comic book Batman on April 25, 1940. Credit for the Joker's creation is disputed; Kane and Robinson claimed responsibility for his design while acknowledging Finger's writing contribution. Although the Joker was planned to be killed off during his initial appearance, he was spared by editorial intervention, allowing the character to endure as the archenemy of the superhero Batman.

In the DC Universe, the Joker is portrayed as a criminal mastermind and the antithesis of Batman in personality and appearance. He was introduced as a murderous psychopath with a warped, sadistic sense of humor but became a comical prankster in the late 1950s in response to regulation by the Comics Code Authority, before returning to his darker roots during the early 1970s. The Joker has been part of defining Batman stories, including the murder of Jason Todd—the second Robin and Batman's ward—in "A Death in the Family" (1988) and the paralysis of Barbara Gordon—the first Batgirl—in The Killing Joke (1988). Unlike many comic book characters, the Joker does not have a definitive origin story, but various possible ones have been developed. The most common story involves him falling into a tank of chemical waste that bleaches his skin white, turns his hair green and lips red, and leaves him with a rictus grin; the resulting disfigurement drives him insane.

The Silver Age of Comic Books was a period of artistic advancement and widespread commercial success in mainstream American comic books, predominantly those featuring the superhero archetype. Following the Golden Age of Comic Books, the Silver Age is considered to cover the period from 1956 to 1970, and was succeeded by the Bronze Age of Comic Books.

The popularity and circulation of comic books about superheroes had declined following World War II, and comic books about horror, crime and romance took larger shares of the market. However, controversy arose over alleged links between comic books and juvenile delinquency, focusing in particular on crime, horror, and superheroes. In 1954, publishers implemented the Comics Code Authority to regulate comic content.

Stan Lee (born Stanley Martin Lieber /ˈliːbər/; December 28, 1922 – November 12, 2018) was an American comic book writer, editor, publisher and producer. He rose through the ranks of a family-run business called Timely Comics which later became Marvel Comics. He was Marvel's primary creative leader for two decades, expanding it from a small publishing house division to a multimedia corporation that dominated the comics and film industries.

In collaboration with others at Marvel – particularly co-plotters and artists Jack Kirby and Steve Ditko – he co-created iconic characters, including Spider-Man, the X-Men, Iron Man, Thor, the Hulk, Ant-Man, the Wasp, the Fantastic Four, Black Panther, Daredevil, Doctor Strange, the Scarlet Witch, and Black Widow. These and other characters' introductions in the 1960s pioneered a more naturalistic approach in superhero comics. In the 1970s, Lee challenged the restrictions of the Comics Code Authority, indirectly leading to changes in its policies. In the 1980s, he pursued the development of Marvel properties in other media, with mixed results.

Gil Kane (/ɡɪl keɪn/; born Eli Katz /kæts/, Latvian: Elija Kacs; April 6, 1926 – January 31, 2000) was a Latvian-born American comics artist whose career spanned the 1940s to the 1990s and virtually every major comics company and character.

Kane co-created the modern-day versions of the superheroes Green Lantern and the Atom for DC Comics, and co-created Iron Fist and Adam Warlock with Roy Thomas for Marvel Comics. He was involved in the anti-drug storyline in The Amazing Spider-Man #96–98, which, at the behest of the U.S. Department of Health, Education, and Welfare, bucked the then-prevalent Comics Code Authority to depict drug abuse, and ultimately spurred an update of the Code. Kane additionally pioneered an early graphic novel prototype, His Name Is... Savage, in 1968, and a seminal graphic novel, Blackmark, in 1971.